IR36021 datasheet(31/41 Pages) IRF

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IR36021

DIGITAL POL BUCK CONTROLLER with I2C AND PMBus

Interface

February 27, 2013 | Rev 3.5

TABLE 23: I2C ADDRESSING

Controller I2C

7‐bit Address

I2C_Addr<6:0> is non‐zero*

I2C_addr<6:0>

Test mode (EN=VR_HOT=low)

0A hex

* Note Address 00h is not allowed. This is the I2C Broadcast

Address.

TABLE 24: PMBUS ADDRESSING

PM_Addr<3:0>

Calculated

8‐bit

address

code

PMBus

7‐bit

Address

(Loop1)

I2C 7‐bit

address

when tied

to PMBus

1111

1110 1110

77 hex

37 hex

1110

1110 1100

76 hex

36 hex

1101

1110 1010

75 hex

35 hex

1100

1110 1000

74 hex

34 hex

1011

1110 0110

73 hex

33 hex

1010

1110 0100

72 hex

32 hex

1001

1110 0010

71 hex

31 hex

1000

1110 0000

70 hex

30 hex

0111

1000 1110

47 hex

2F hex

0110

1000 1100

46 hex

2E hex

0101

1000 1010

45 hex

2D hex

0100

1000 1000

44 hex

2C hex

0011

1000 0110

43 hex

2B hex

0010

1000 0100

42 hex

2A hex

0001

1000 0010

41 hex

29 hex

0000

1000 0000

40 hex

28 hex

EN=VR_HOT=low

0001 1010

0D hex

0A hex

1: This I2C address only takes effect if Register 0x12[6:0]

=0000000

TABLE 25: I2C OFFSET OPTIONS

Enable_I2C

Addr_Offset MTP bit

I2C Address Offset

disabled

enabled

Figure 37: ADDR_PROT Pin Components

REAL‐TIME I2C MONITORING FUNCTIONS

IR36021 provides real‐time accurate measurement of input

voltage, input current, output voltage, output current and

temperature over the I2C interface. Output voltage is

calculated based upon the VID setting and loadline and the

result is reported through the I2C.

TABLE 26: ADDR_PROT RESISTOR OFFSET

ADDR_PROT

Resistor

I2C Address

Offset

0.845kΩ

1.30kΩ

1.78kΩ

2.32kΩ

2.87kΩ

3.48kΩ

4.12kΩ

4.75kΩ

5.49kΩ

6.19kΩ

6.98kΩ

+10

7.87kΩ

+11

8.87kΩ

+12

10.00kΩ

+13

11.00kΩ

+14

12.10kΩ

+15

*Note: Extends the range of PMBus addresses.

IR36021 Datasheet(PDF) 31 Page - International Rectifier

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